another, not that well known, tag which is IMHO quite useful when you have to serve static pages <base>[0].
[0] https://developer.mozilla.org/en-US/docs/Web/HTML/Element/ba...
Edit: 1996 is just a random reference, not actually checked. Edit2: Link to English MDN.
When looking up on how to do something for the web, one get tons of answers describing how to do it with javascript and usually with js frameworks. The simple methods (which do not cover all cases but are sometimes enough) are usually buried under.
So unless beginner learn by heart all the html tags (and that is not beginner friendly) they won't know those basic features, so I think that's cool to have a reminder.
The Internet is getting more and more "sources", but all of them seem to be almost direct copies of already existing source of information, just with a different layout.
Also, I used "tree" loosely. I meant something closer to a DAG.
I think part of it is stack overflow where 15 years ago the only way to do a lot of stuff was a couple functions full of jquery so that's what the "correct" answers say to do.
I am hitting a lot of weird little things running from static files, but I think it helps me quite a bit that I know html from when it was young -- hand crafting html for your angelfire site in the 1990's sort of prepared me for semantic tags...